Date: Fri, 9 Apr 2004 22:51:03 +0100 (BST)
From: Hugh Dickins <hugh@veritas.com>
To: "Martin J. Bligh" <mbligh@aracnet.com>
cc: linux-kernel@vger.kernel.org, Andrew Morton <akpm@osdl.org>,
       Rajesh Venkatasubramanian <vrajesh@umich.edu>
Subject: Re: [PATCH] anobjrmap 9 priority mjb tree
In-Reply-To: <1524892704.1081543162@[10.10.2.4]>
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On Fri, 9 Apr 2004, Martin J. Bligh wrote:
> > This anobjrmap 9 (or anon_mm9) patch adds Rajesh's radix priority search
> > tree on top of Martin's 2.6.5-rc3-mjb2 tree, making a priority mjb tree!
> > Approximately equivalent to Andrea's 2.6.5-aa1, but using anonmm instead
> > of anon_vma, and of course each tree has its own additional features.
> 
> This slows down kernel compile a little, but worse, it slows down SDET
> by about 25% (on the 16x). I think you did something horrible to sem
> contention ... presumably i_shared_sem, which SDET was fighting with
> as it was anyway ;-(
> 
> Diffprofile shows:
> 
>     122626    15.7% total
>      44129   790.0% __down
>      20988     4.1% default_idle

Many thanks for the good news, Martin ;)
Looks like I've done something very stupid, perhaps a mismerge.
Not found it yet, I'll carry on looking tomorrow.

Hugh

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